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Radon Mitigation Cost Calculator (2026)

Estimate the cost to install a radon mitigation system. Pick foundation type, system type, fan size. 2026 data; not a contractor bid.

Residential radon mitigation system installed against an exterior wall with a white PVC suction pipe, in-line radon fan, and U-tube manometer visible at the discharge

Enter your radon mitigation project

Includes labor, equipment, and contractor markup.

Common projects

Foundation & system

Adjusts labor & material rates for your region.
Uses the first 3 digits as a planning zone (not exact local pricing).

Your radon mitigation estimate

Estimated installed range
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Cost breakdown

ItemQuantityEstimated range
Planning estimate, not a bid. 2026 ranges informed by EPA Citizen's Guide to Radon, ANSI AARST/RMS-LB 2018, NRPP / NRSB certifications, RadonAway MSRPs, Homewyse.
What's not included: pre-mitigation testing (separate $150-$300), foundation crack sealing if extensive, sump-cover gasket, second / third systems if first does not reduce below 4 pCi/L, and roof-mounted fan housings on flat roofs

Bid check

Got a contractor quote? Compare it to the planning range.

Common mistakes & questions

  • Test before AND after — without a post-test you do not know if the mitigation actually worked.
  • Fan must be in unconditioned space (attic / exterior) per ANSI AARST — running it inside the conditioned envelope spreads radon.
  • Slab cracks must be sealed for SSD to work — visible cracks defeat depressurization.
  • Block-wall foundations need block-wall depressurization, not standard SSD.
  • NRPP / NRSB certification is required by most states — verify the contractor before signing.

FAQ

How much does radon mitigation cost in 2026?

A standard sub-slab depressurization (SSD) for a basement runs $1,200-$2,200 installed including fan, electrical, and post-test. Slab-on-grade $1,500-$2,800. Crawl space sub-membrane $1,800-$3,200. Block-wall systems $2,200-$3,800.

Do I need a permit for radon mitigation?

Most jurisdictions require a permit ($75-$200) and many require the contractor be NRPP / NRSB certified. Always test before and after.

Will the mitigation work?

A properly designed SSD reduces radon by 50-99% in most homes. Post-test should show under 4 pCi/L (EPA action level). If not, additional suction points or a higher-flow fan may be needed.

Cost factors

  • Project size and scope. Bigger radon mitigation jobs cost less per unit but more in total; tier and scope drive the rest.
  • Access difficulty. Tight, multi-story, or restricted access adds 10-25% on labor.
  • Permit and code. Permit fees vary by jurisdiction; most projects need a permit and inspection.
  • Material grade. Budget vs mid vs premium materials change cost by 50-100%.
  • Local labor rates. Coastal metros run 25-35% higher than the national average.

What's included

  • Standard materials at the selected tier
  • Standard labor by a licensed crew
  • Mobilization, equipment, and disposal of normal demo
  • Standard residential permit (where applicable)

What's not included

  • Hidden damage discovered after demo
  • Asbestos / lead abatement on pre-1978 buildings
  • Engineering for non-standard structural conditions
  • Site work beyond the listed scope
  • Long-distance freight on specialty materials

Good-quote checklist

  • Confirm the NRPP-certified mitigator is licensed and insured
  • Confirm scope-of-work in writing (materials, labor, exclusions)
  • Confirm warranty on materials and on labor separately
  • Confirm permit pull and inspection schedule
  • Confirm payment schedule (deposit, progress, final)
  • Get 2-3 written quotes for the same scope before signing

More questions

Do I need a permit for radon mitigation?

Most jurisdictions require a permit; a few exempt very small jobs. Always confirm with your local building department.

How long does a typical radon mitigation project take?

Depends on scope; basic jobs are 1-3 days, complex jobs run 1-2 weeks.

How many quotes should I get?

Get 2-3 written quotes for the same scope. Big spreads usually mean different inclusions, not necessarily different value.

What's the typical warranty?

Workmanship warranty 1-5 years from the contractor; manufacturer warranty on materials separately.

Can I DIY this?

Some scopes are DIY-friendly with rented tools; others (gas, electrical, structural, plumbing) require licensed trades by code.